/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.util.ntlm;

import java.io.IOException;
import java.io.OutputStream;

import cgl.narada.util.ByteUtilities;
/**
 * Title:
 * Description:
 * Company:
 * @author John Yin
 */

public class NTLMMessage {

    // Field #1
    protected byte[] protocol = { 'N', 'T', 'L', 'M', 'S', 'S', 'P', '\0' };

    /**
     * -------------------------------------------------------------------------
     */
    protected byte[] export() throws IOException {
        return protocol;
    }

    /**
     * -------------------------------------------------------------------------
     * Write a short into the outputstream in NTLM format.
     */
    protected void writeShort(int len,OutputStream out) throws IOException {
        byte[] bytes = ByteUtilities.getBytes(len);
        out.write(bytes[3]);
        out.write(bytes[2]);
    }

    /**
     * -------------------------------------------------------------------------
     * Writes
     * (short)len
     * (short)len
     * (short)offset
     *
     * to the output stream.
     */
    protected void writeLenOffset(int len,int offset,OutputStream out) throws IOException {
        byte[] lenBytes = ByteUtilities.getBytes((int)len);
        byte[] offsetBytes = ByteUtilities.getBytes((int)offset);

        out.write(lenBytes[3]);
        out.write(lenBytes[2]);
        out.write(lenBytes[3]);
        out.write(lenBytes[2]);
        out.write(offsetBytes[3]);
        out.write(offsetBytes[2]);
    }

    /**
     * -------------------------------------------------------------------------
     * Write a string in unicode format to output stream as dictated by NTLM
     * Unicode format (low byte first).
     */
    protected void writeUnicode(String str,OutputStream out) throws IOException {
        byte[] bytes = str.getBytes("Unicode");
        out.write(bytes,2,bytes.length-2);
    }
}
